CN2541947Y

CN2541947Y - Electromagnetic relay with differential magnetic circuit structure

Info

Publication number: CN2541947Y
Application number: CN 02222476
Authority: CN
Inventors: 栾伟
Original assignee: GUILIN AEROSPACE ELECTRIC APPLIANCE CO
Current assignee: GUILIN AEROSPACE ELECTRIC APPLIANCE CO
Priority date: 2002-04-26
Filing date: 2002-04-26
Publication date: 2003-03-26
Anticipated expiration: 2012-04-26

Abstract

The utility model relates to an electromagnetic relay in a differential type magnetic structure, and comprises a coil and an iron core which is arranged in the coil. The utility model is characterized in that the center of the iron core is a pole, two ends which are arranged on two ends of the coil are magnetic steel of another pole and are respectively connected with the iron core and yoke iron which is connected with the magnetic steel to form into a magnetic circuit, armature iron, and a small shaft which is arranged at the center of the armature iron, the small shaft is arranged on a central axis which the magnetic steel and the coil are arranged at, the iron core 2 and the armature iron are formed into an integrated structure, the iron core 2 is extended out of two ends of the coil 1 for being downwardly bended, two ends are provided with two iron core buckling ends 21 to replace the armature iron, the magnetic steel 3 is arranged between the iron core buckling ends 21 which are arranged on two ends, the small shaft 41 which is arranged at the center of the armature iron 4 is arranged on the upper end of the armature iron 4, namely, which is to be arranged between the armature iron 4 and the magnetic steel 3. Although the working principles of the relay in the differential type magnetic structure are the same with that of the prior product, the bulk is smaller and the sensitivity is higher, and the indexes such as the endurance environment and the reliability are higher.

Description

The electromagnetic relay of differential type magnetic structure

(1) technical field:

The utility model relates to a kind of polarized relay that does not have intermediate position of rest, specifically a kind of electromagnetic relay of differential type magnetic structure.

(2) background technology:

The differential type magnetic structure is a kind of structure commonly used in the electromagnetic relay, its operation principle is: the magnet steel center is a utmost point, the magnet steel two ends are another utmost point, when coil does not encourage, armature keeps at one end, when coil stimulating and make its flow direction and armature keep the permanent magnet flux direction of end opposite, then the suffered magnetizing force of armature changes and might be along little axle rotation.This structure has the advantages that coil power dissipation is low, volume is little, the endurance environment is high, and therefore, electromagnetic relay extensively adopts this structure with in the electronics that is applied to work under various severe environmental conditions, the electric equipment.The basic structure of existing differential type magnetic circuit system as shown in Figure 1, mainly be by the iron core in coil 1, the coil 2, magnet steel 3 and be placed in the yoke 5 at coil 1, iron core 2, magnet steel 3 two ends, and armature 4 constitutes, for magnetic conduction, magnet steel 3 centers are provided with a magnetic pole core 8, this magnetic pole core 8 is pointed to the armature 4 of magnet steel 3 lower ends, and center, armature 4 lower end is provided with a little axle 41, and armature 4 can rotate around little axle 41.Side plate 6 among Fig. 1 and a sheet 7 are to be used for fixing and to support above-mentioned each parts.

By magnetic circuit analysis and calculating, find to exist in its existing structure not enough: 1, the non-working-gap magnetic resistance between iron core and the yoke makes that the magnetic flux of magnetic circuit reduces, the leakage field between coil and the magnet steel increases, and has reduced magnetic efficiency and magnetizing force; 2, for reducing the leakage field between magnet steel and coil, magnet steel and the armature, must increase the distance between magnet steel and coil, magnet steel and the armature, therefore, the height of this structure be increased.

(3) utility model content:

The higher electromagnetic relays of index such as volume is littler because electronics, electric equipment need use, sensitivity, endurance environment and reliability, therefore, in order to solve the magnetic circuit leakage field that said structure exists and the problem of structure height, by research and analysis, this practical sexual type has designed the relay of the differential type magnetic structure that a kind of magnetic resistance is little, leakage field is few, magnetic efficiency is high and volume is small and exquisite.Though the operation principle of this structure is identical with existing structure, its volume is littler, sensitivity is higher, and indexs such as its endurance environment and reliability also might further improve.

The electromagnetic relay of this novel differential type magnetic structure, comprise by coil, iron core in the coil, the center is a utmost point, two ends are the magnet steel of another utmost point and place the coil two ends, and the common magnetic circuit that constitutes of the yoke that is connected with magnet steel with iron core respectively, and armature and the little axle of being located at the armature center, little axle is on magnet steel and the residing axis of coil mid point, different is: described yoke and armature are structure as a whole, that is to say that iron core stretches out the coil two ends, and bending downwards, there is the iron core bending end of two alternative yokes at its two ends, and magnet steel is arranged between the iron core bending end of two ends; The little axle at armature center is arranged at the armature upper end, promptly is between armature and the magnet steel.

Position between described magnet steel and the iron core bending end is provided with: be fixed in jointly on the side plate, or be individually fixed on the sheet or be individually fixed on the pedestal, or be individually fixed on the shell or be individually fixed on side plate, sheet, pedestal and the shell, perhaps magnet steel is installed on the iron core bending end.

The mode that is connected that described magnet steel is fixed on the iron core bending end is: magnet steel is stuck between the iron core bending end that is in two ends;

Perhaps the iron core bending end offers draw-in groove, and correspondingly, the termination, two ends of magnet steel is provided with tenon, and tenon is stuck in respectively in the draw-in groove on the iron core bending end,

Perhaps magnet steel and iron core bending end are for welding, rivet or fixing with plate.

Described draw-in groove is opened in the both sides of iron core bending end, is non-penetrating groove.

The little axle of described armature is stuck in to be offered in the vertical channel that is in magnet steel vertical central axis place on side plate, sheet, pedestal or the shell or the inverted U groove or in the circular hole.

Though the relay operation principle of this novel differential type magnetic structure is identical with existing product, its volume is littler, sensitivity is higher, and indexs such as its endurance environment and reliability are also higher.

The contrast of structure contrast by Fig. 1, Fig. 2 and the equivalent magnetic circuit figure of Fig. 3, Fig. 4, and the utilization computer is to the analysis and the calculating of magnetic circuit, new construction has remarkable advantages than existing structure:

A. the air gap between new construction coil and the magnet steel only needs 0.1mm (insulating barrier), but than existing structure air gap is that the leakage field magnetic flux of 0.5～0.8mm is little, and little axle has saved the height of little axle and part magnetic pole core as magnetic pole core, therefore, the height of new construction can reduce by 10%～20%;

B. new construction does not have the non-working-gap at iron core two ends, and therefore, the magnetic resistance in the magnetic circuit reduces, magnetic flux increases, the leakage field magnetic flux is also less, and coil power dissipation can reduce about 30%;

C. the parts of new construction reduce, and iron core and yoke become one, and can effectively improve the mechanical environment performance of structure;

The parts of d, new construction reduce, and structure is more simple, and processing, assembly process are reduced, and the difficulty reduction, and therefore, reliability can further improve;

E, since new construction have above-mentioned advantage, therefore, by adjusting pole-face, air gap and the coil parameter of yoke and armature, can be applied to monostable type, bistable type, sensitive-type widely and switch on all kinds of electromagnetic relays of large and small power than existing structure.

Among Fig. 3, Fig. 4:

Represent permanent magnetism, leakage field and electromagnetism magnetic flux respectively; Fm, Rm---permanent magnetism equivalence magnetic potential, magnetic resistance; IW, Re1, Re2---electromagnetism equivalence magnetic potential, iron core magnetic resistance; Non-working-gap magnetic resistance between R1, R2---iron core and the yoke; Working gas gap magnetic resistance between R3, R4---armature and the yoke; Working gas gap magnetic resistance between R5---armature and the magnetic pole core (or little axle); Rd---magnetic pole core (or little axle) magnetic resistance; Rc1, Rc2, Rc3, Rc4---armature magnetic resistance; Rb1, Rb2, Rb3, Rb4---yoke magnetic resistance; Ro1, Ro2, Ro3---magnet steel and coil, the leakage field resistance between magnet steel and the armature.

(4) description of drawings:

Fig. 1 is the magnetic structure schematic diagram of the relay of existing differential type magnetic structure;

Fig. 2 is the magnetic structure schematic diagram of the relay of this novel differential type magnetic structure;

Fig. 3 is the equivalent magnetic circuit schematic diagram of the relay of existing differential type magnetic structure;

Fig. 4 is the equivalent magnetic circuit schematic diagram of the relay of this novel differential type magnetic structure.

(5) embodiment:

Concrete when implementing the utility model, with cutting process, casting method or with pure iron plate gram bender tool processing method, produce the iron core 2 and the yoke 5 of one, that is to say that iron core 2 stretches out coil 1 and bending downwards, iron core bending end 21 replacement yokes 5; Coil rack 12 is fixed on the iron core 2, is wound with one or more coils 1 on the coil rack 12; Magnet steel 3 is arranged between the iron core bending end 21.Position between coil 1 and iron core 2 and iron core bending end 21 and the magnet steel 3 perhaps is fixed on magnet steel 3 on the iron core bending end 21 by respectively they being fixed on side plate 6, sheet 7, pedestal or the shell to keep stable; This mode that is connected can adopt magnet steel 3 is stuck between the iron core bending end 21 at two ends, perhaps on iron core bending end 21, offer draw-in groove, and be provided with tenon in termination, magnet steel 3 two ends, the two ends tenon is stuck in respectively in the draw-in groove of iron core bending end 21, also magnet steel 3 can be welded, rivets or is fixed on the iron core bending end 21 with plate certainly.Because when iron core bending end 21 outer ends are exposed in the termination of magnet steel 3, the termination of magnet steel 3 forms the magnetic circuit of an opening, leakage field is bigger like this, therefore, the termination of magnet steel 3 preferably is stuck in iron core bending end 21 inboards, if iron core bending end 21 inboards open for penetrating draw-in groove, in order to reduce leakage field, under the prerequisite that guarantees mechanical strength, the tenon end face should be as far as possible little.

For reducing structure height little axle 41 is fastened on armature 4 upper ends, promptly between armature 4 and the magnet steel 3, also played little 41 of the magnetic conduction effect identical at this moment, so this structure can be omitted magnetic pole core 8 with pole body 8; In order to make the vertical central axis place that little axle 41 on the armature 4 is in magnet steel 3 can horizontal slip, little axle 41 can be stuck in and be opened in the vertical channel that is in magnet steel 3 vertical central axis places on side plate 6, sheet 7, pedestal or the shell or the inverted U groove or in the circular hole.

This new type of relay not only can be made into the monostable electromagnetic relay, when coil is the coiling of bistable state mode, also can be made into the bistable electro magnetic relay.

Claims

1, the electromagnetic relay of differential type magnetic structure, comprise by coil, iron core in the coil, the center is a utmost point, two ends are for the magnet steel of another utmost point and place the coil two ends and the yoke that is connected with magnet steel with the iron core respectively magnetic circuit of formation jointly, and armature and the little axle of being located at the armature center, little axle is on magnet steel and the residing axis of coil mid point, it is characterized in that: described iron core (2) is structure as a whole with yoke (5), that is to say that iron core (2) stretches out coil (1) two ends, and bending downwards, there is the iron core bending end (21) of two alternative yokes (5) at its two ends, and magnet steel (3) is arranged between the two ends iron core bending ends (21); The little axle (41) at armature (4) center is arranged at armature (4) upper end, promptly is between armature (4) and the magnet steel (3).

2, the electromagnetic relay of differential type magnetic structure according to claim 1, it is characterized in that: the position between described magnet steel (3) and the iron core bending end (21) is provided with and is: be fixed in jointly on the side plate (6), or be individually fixed in sheet (7) and go up or be individually fixed on the pedestal, or be individually fixed on the shell or be individually fixed on side plate (6), sheet (7), pedestal and the shell, perhaps magnet steel (3) is installed on the iron core bending end (21).

3, the electromagnetic relay of differential type magnetic structure according to claim 2 is characterized in that: the mode that is connected that described magnet steel (3) is fixed on the iron core bending end (21) is: magnet steel (3) is stuck between the iron core bending end (21) that is in two ends;

Perhaps iron core bending end (21) offers draw-in groove, and correspondingly, the termination, two ends of magnet steel (3) is provided with tenon, and tenon is stuck in respectively in the draw-in groove on the iron core bending end (21),

Perhaps magnet steel (3) is welding with iron core bending end (21), rivets or fix with plate.

4, the electromagnetic relay of differential type magnetic structure according to claim 3 is characterized in that: described draw-in groove is opened in the both sides of iron core bending end (21), is non-penetrating groove.

5, according to the electromagnetic relay of the described differential type magnetic structure of claim 1～4, it is characterized in that: the little axle (41) of described armature (4) is stuck in and is opened on side plate (6), sheet (7), pedestal or the shell, is in the vertical channel at magnet steel (3) vertical central axis place or the inverted U groove or in the circular hole.